Under these circumstances, if eBay doesn't give you your money back (there's no way of resolving it with Evri when eBay is the customer) and an INR case fails, it may be beneficial to contact your payment provider and raise a dispute that way.

I always pay with PayPal, and that way, I (as a buyer) get 3 ways to get this sort of things resolved:

1. Directly via eBay through INR or INAD if not described 

2. If (1) doesn't work, open a PayPal claim - this is external to eBay so eBay won't have a say on what happens

3. If (2) is also unsuccessful, open a charge back claim with your bank against PayPal, again external to any of the above. 

I had an issue once where Parcel2Go overcharged me, so I went to PayPal. They sided with Parcel2Go, so I then opened a case with my bank and they gave me my refund. Presumably the bank swallowed the cost, because PayPal don't like charge backs!

Anyway, at least there are the above methods of recourse should you need them...